Online PDF annotation and signing tool

About This Tool

SmartPDF Annotator provides seamless features to annotate, underline, draw, sign, and apply stamps directly on PDFs in real-time from your browser. Designed for professionals and teams to collaborate faster.

📝 Note Taking
Add comments and descriptions
✍️ Pen Tool
Write or draw with freehand strokes
🔏 Digital Seal
Stamp company or approval seals
🖊️ Signatures
Add or draw your own signature

Quick answer

Open a PDF in the viewer to read it, add annotations such as highlights or comments, and place a signature directly on the document.

Key facts

  • Uses the Syncfusion EJ2 PDF Viewer, a third-party commercial JavaScript library loaded from Syncfusion's own content delivery network|Supports viewing, annotating (e.g. highlights, comments, shapes), and adding signatures to PDFs|No dedicated A2Z Tools server endpoint for this viewer was found in this codebase, suggesting most processing may occur in your browser, though the third-party library may make its own network requests we cannot fully audit|Free to use, no signup required

What is this tool?

This tool lets you open a PDF, review it with a full-featured viewer, add annotations like highlights and comments, and place a signature directly on the document, all through the Syncfusion PDF Viewer component.

How to use it

Open your PDF in the viewer, use the toolbar to add highlights, comments, or shapes as needed, place a signature if required, then save or download the updated PDF.
  1. Open or upload the PDF you want to view.|Use the viewer's toolbar to navigate pages, zoom, or search text.|Add annotations such as highlights, comments, or shapes as needed.|Add a signature to the document if required.|Save or download your annotated/signed PDF.

Example

Example: opening a contract PDF, highlighting a clause, adding a comment, and placing your signature at the bottom before downloading the annotated file.

How it works

The page loads the Syncfusion EJ2 PDF Viewer JavaScript library from Syncfusion's CDN, which renders the PDF and provides built-in tools for annotation and signature placement. No dedicated A2Z Tools backend endpoint for this feature was found in this codebase.

Common use cases

Reviewing and marking up a contract or agreement before signing.|Adding comments or highlights to a document for collaborative review.|Signing a PDF form or agreement electronically.|Viewing a PDF without needing separate desktop PDF software.

Benefits

Free, browser-based PDF review and annotation without installing dedicated PDF software.

Limitations

This tool relies on Syncfusion's third-party PDF Viewer component, so its exact processing behavior (what stays local versus what the library itself may transmit) is governed by that library, not fully auditable from A2Z Tools' own codebase; a signature added here is a visual mark, not a legally binding cryptographic digital signature -- check your jurisdiction's requirements if you need a legally recognized e-signature.

Privacy & your data

This page loads the Syncfusion EJ2 PDF Viewer from Syncfusion's own CDN, a third-party JavaScript library. We found no dedicated A2Z Tools server endpoint handling this viewer's PDF processing in this codebase, which suggests viewing and annotation may primarily run in your browser -- however, because the Syncfusion library is third-party code, we cannot fully verify from this codebase whether it makes any of its own network requests.

Frequently asked questions

Is the signature added here a legally binding digital signature?
It is a visual signature mark placed on the document, not a cryptographically verified digital signature -- check your jurisdiction's legal requirements if you need a legally recognized e-signature.
Does this tool send my PDF to a server?
We found no dedicated A2Z Tools server endpoint for this viewer in this codebase, suggesting processing may largely happen in your browser via the Syncfusion library; however, that third-party library's own network behavior is not something we can fully audit from this codebase.
What kind of annotations can I add?
Typical PDF annotation tools such as highlights, comments, sticky notes, and drawn shapes are available through the Syncfusion viewer's toolbar.
Is this tool free to use?
Yes, it's free with no signup required.

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